The supervolcano at Yellowstone National Park has substantially more magma reservoir under the caldera than scientists previously thought, according to new research.
Researchers mapped the seismic wave speed below the Yellowstone volcano using a technique called seismic tomography. This 3D modeling of seismic waveforms measures the volume of the melt and makes assumptions of the distribution of how the melt is spread in the subsurface in Yellowstone's magma reservoir, Ross Maguire, an assistant professor at the University of Illinois Urbana-Champaign's department of geology and author of the study, told ABC News.
"We found that it's likely that Yellowstone's crustal magma reservoir holds more melt than previously was thought," Maguire said, adding that there is up to 20% melt at shallow depths.George D. Lepp/Getty ImagesThe Yellowstone magma reservoir is not so much "a big tank of magma," with accumulation all in one body, Maguire said, but rather, more like a "snow cone," in which there is a solid component and a liquid component, Kari M.
"They would be of a similar size to what's happened in the very recent Yellowstone history that's produced a series of lava flows that filled the most recent caldera after the most recent really large eruption," she said. Yellowstone eruption, illustration. Yellowstone National Park is sited above an underground magma chamber.Despite the new discovery, the research does not indicate that an eruption will happen any time soon, the scientists said. There are no signs of "increased volcanic unrest" at Yellowstone, Maguire said.
"This really does not change the hazard assessment at all, because we already knew that. We already knew this was the recent activity," Cooper said. "We already knew that was the most likely sort of activity to happen next.
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